T4, Free

Centralized Core Laboratory:Special Chemistry

Test ID/Workstation: T4FR SCRED

Specimen Type: Blood

Tube Type: Red top (no anticoagulant) tube

Collection Volume: 0.7 mL (minimum 0.7 mL)

Cause for rejection: Hemolysis

Storage: Frozen

Availability: Mon-Fri (0800-1600)

Methodology: Chemiluminescent Assay

Special Instructions: Do not use serum separator tube. Specimen must be in lab by 1300 for same day results.

OC Power Word: LT4FR

Lab/Phone: 330-543-8484

TAT: 1 hour

Additional Info: Ref. range is age dependent; avail on patient report

CPT Code: 84439

Synonyms: Free Thyroxine; Unbound T4

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330-543-1000 (operator)

(8 a.m.-4:30 p.m.)


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